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    Software name: appdown
    Software type: Microsoft Framwork

    size: 316MB

    Lanuage:Englist

    Software instructions

      In compression processes no material is cut away as in cutting or grinding, the mass being forced into shape by dies or forms that give the required configuration. The action of compressing machines may be either intermittent, as in the case of rolling mills; percussive, as in steam hammers, where a great force acts throughout a limited distance; or gradual and sustained, as in press forging. Machines of application, for abrading or grinding, are constantly coming more into use; their main purpose being to cut or shape material too hard to be acted upon by compression or by cutting processes. It follows that the necessity for machines of this kind is in proportion to the amount of hard material which enters into manufactures; in metal work the employment of hardened steel and iron is rapidly increasing, and as a result, grinding machines have now a place among the standard machine tools of a fitting shop.



      CHAPTER XXII. PATTERN-MAKING AND CASTING.

      PREFACE135

      The bridge-command at the pontoon-bridge near Lixhe allowed me to cross, after requesting me very pressingly to make very clear what swine these Belgians were, who fired so treacherously at unsuspecting soldiers, put out the eyes of the wounded, cut off their hands and genitals. When I asked where all these things had happened, the answer was: "Everywhere!" Of course, I promised them to do everything they wanted."Hm! Hm! All right. So you intend to write friendly about us?"


      "I am...."

      "That is a Netherland girl, sir, who was staying at her aunt's at Lige ... I mean to say at Vis, and whom I take now with me to Maastricht."In making up the time charged to different machines during their construction, a good plan is to supply each workman with a slate and pencil, on which he can enter his time as so many hours or fractions of hours charged to the respective symbols. Instead of interfering with his time, this will increase a workman's interest in what he is doing, and naturally lead to a desire to diminish the time charged to the various symbols. This system leads to emulation among workmen where any operation is repeated by different persons, and creates an interest in classification which workmen will willingly assist in.

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      I am well aware how far this opinion is at variance with practice, especially in England; yet careful observation in a workshop [140] will prove that power feed in ordinary drilling effects no saving of time or expense.Power-hammers operated by crank motion, adapted to the lighter kinds of work, are now commonly met with in the forging-shops of engineering establishments. They are usually of very simple construction, and I will mention only two points in regard to such hammers, which might be overlooked by an apprentice in examining them.

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      (1.) Name some of the principal points to be kept in view in preparing designs?(2.) Why should attempts at designing be confined to one class of machinery?(3.) What objection exists to examining references when preparing designs?"The police service will be performed in the daytime by some volunteers, who will wear an armlet in the municipal colours, and an identity card, both officially stamped. Well-minded persons, who are willing to perform these duties, are urgently requested to present themselves at the town-hall to-day at four o'clock in the afternoon.

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      I have explained already in the chapter "Round about Lige" that I myself was duped occasionally, for example, by the story of the three hundred civilians who had been shot. To my mind these violent acts at the beginning of the war were part and parcel of the system of frightfulness, by which the Germans tried to scare the population and indirectly the hostile armies, at the same time rousing their own soldiers to anger and fury.Professor Noyons took me all over the hospital, and if I should describe all I saw and heard there, that story alone would fill volumes. He took me, for example, to a boy of eight years old, whose shoulder was shattered by rifle-shots. His father and140 mother, four little brothers and a sister, had been murdered. The boy himself was saved because they thought that he was dead, whereas he was only unconscious. When I asked for his parents, brothers and sister, he put up his one hand and, counting by his little fingers, he mentioned their names.


      alllittle